Trip.com
>
Flights
>
Flights to United States
>
Flights to Colorado
>
Flights to Denver
>
St. Louis to Denver flight
>
St. Louis Lambert International Airport to Denver International Airport flight

Explore the cheapest one-way and round-trip flights from St. Louis Lambert International Airport to Denver International Airport over the next 90 days, with one-way fares from €39 and round-trip from €80. Based on Trip.com's latest 7-day flight data.

    • Cheapest nonstop
      STL 7:54 PM
      2h 31m
      DEN 9:25 PM
      St. Louis - Denver | Sat, Dec 12 | Frontier Airlines
      DEN 7:47 AM
      2h 10m
      STL 10:57 AM
      Denver - St. Louis | Tue, Dec 15 | Frontier Airlines
      €80 €257
      69% off
      69% off
      €257 €80
    • STL 7:59 PM
      2h 31m
      DEN 9:30 PM
      St. Louis - Denver | Sun, Nov 8 | Frontier Airlines
      DEN 4:09 PM
      2h 5m
      STL 7:14 PM
      Denver - St. Louis | Tue, Nov 10 | Frontier Airlines
      €143 €257
      44% off
      44% off
      €257 €143
    • STL 8:40 AM
      2h 31m
      DEN 10:11 AM
      St. Louis - Denver | Sat, Dec 12 | United Airlines
      DEN 7:47 AM
      2h 10m
      STL 10:57 AM
      Denver - St. Louis | Tue, Dec 15 | Frontier Airlines
      €162 €257
      37% off
      37% off
      €257 €162
    • STL 7:59 PM
      2h 31m
      DEN 9:30 PM
      St. Louis - Denver | Tue, Nov 3 | Frontier Airlines
      DEN 4:09 PM
      2h 5m
      STL 7:14 PM
      Denver - St. Louis | Tue, Nov 10 | Frontier Airlines
      €191
      26% off
      €257 €191
    • STL 7:59 PM
      2h 31m
      DEN 9:30 PM
      St. Louis - Denver | Tue, Nov 10 | Frontier Airlines
      DEN 4:09 PM
      2h 5m
      STL 7:14 PM
      Denver - St. Louis | Tue, Nov 17 | Frontier Airlines
      €193
      25% off
      €257 €193
    • STL 7:59 PM
      2h 31m
      DEN 9:30 PM
      St. Louis - Denver | Tue, Nov 17 | Frontier Airlines
      DEN 7:55 AM
      2h 8m
      STL 11:03 AM
      Denver - St. Louis | Tue, Nov 24 | Frontier Airlines
      €197
      23% off
      €257 €197
    • STL 8:00 PM
      2h 39m
      DEN 9:39 PM
      St. Louis - Denver | Sat, Oct 17 | Frontier Airlines
      DEN 4:12 PM
      2h 3m
      STL 7:15 PM
      Denver - St. Louis | Tue, Oct 20 | Frontier Airlines
      €199
      23% off
      €257 €199
    • STL 6:03 AM
      7h 17m
      DEN 12:20 PM
      St. Louis - Denver | Sat, Dec 12 | Delta Air Lines
      DEN 7:47 AM
      2h 10m
      STL 10:57 AM
      Denver - St. Louis | Tue, Dec 15 | Frontier Airlines
      €124
      52% off
      €257 €124
    • STL 7:59 PM
      2h 31m
      DEN 9:30 PM
      St. Louis - Denver | Sat, Nov 14 | Frontier Airlines
      DEN 10:44 PM
      12h 49m
      STL 12:33 PM
      Denver - St. Louis | Mon, Nov 16 | Frontier Airlines
      €156
      39% off
      €257 €156
    • STL 1:00 PM
      17h 25m
      1 stop
      DEN 2:00 PM
      St. Louis - Denver | Sun, Oct 18 | Normal Airline
      DEN 3:00 PM
      6h
      Nonstop
      STL 4:00 PM
      Denver - St. Louis | Tue, Oct 20 | Normal Airline
      Find more flights
      Find more flights
    • Cheapest
      STL 7:58 PM
      2h 31m
      Nonstop
      DEN 9:29 PM
      St. Louis - Denver | Thu, Dec 3 | Frontier Airlines
      €39 €78
      50% off
      50% off
      €78 €39
    • Cheapest
      STL 7:54 PM
      2h 31m
      Nonstop
      DEN 9:25 PM
      St. Louis - Denver | Sun, Dec 6 | Frontier Airlines
      €39 €78
      50% off
      50% off
      €78 €39
    • Cheapest
      STL 7:58 PM
      2h 31m
      Nonstop
      DEN 9:29 PM
      St. Louis - Denver | Wed, Dec 2 | Frontier Airlines
      €39 €275
      86% off
      86% off
      €275 €39
    • Cheapest
      STL 7:54 PM
      2h 31m
      Nonstop
      DEN 9:25 PM
      St. Louis - Denver | Sat, Dec 5 | Frontier Airlines
      €39
      86% off
      €275 €39
    • STL 7:59 PM
      2h 31m
      Nonstop
      DEN 9:30 PM
      St. Louis - Denver | Tue, Nov 17 | Frontier Airlines
      €40
      49% off
      €78 €40
    • STL 7:59 PM
      2h 31m
      Nonstop
      DEN 9:30 PM
      St. Louis - Denver | Tue, Nov 3 | Frontier Airlines
      €40
      49% off
      €78 €40
    • STL 7:59 PM
      2h 31m
      Nonstop
      DEN 9:30 PM
      St. Louis - Denver | Sun, Nov 8 | Frontier Airlines
      €40
      49% off
      €78 €40
    • STL 7:54 PM
      2h 31m
      Nonstop
      DEN 9:25 PM
      St. Louis - Denver | Sun, Dec 13 | Frontier Airlines
      €40
      49% off
      €78 €40
    • STL 7:54 PM
      2h 31m
      Nonstop
      DEN 9:25 PM
      St. Louis - Denver | Tue, Dec 15 | Frontier Airlines
      €40
      49% off
      €78 €40
    • STL 1:00 PM
      17h 25m
      1 stop
      DEN 2:00 PM
      St. Louis - Denver | Sun, Oct 18 | Normal Airline
      Find more flights
      Find more flights
    • Cheapest nonstop
      STL 7:58 PM
      2h 31m
      Nonstop
      DEN 9:29 PM
      St. Louis - Denver | Wed, Dec 2 | Frontier Airlines
      €39 €212
      82% off
      82% off
      €212 €39
    • STL 7:54 PM
      2h 31m
      Nonstop
      DEN 9:25 PM
      St. Louis - Denver | Sat, Dec 5 | Frontier Airlines
      €39 €212
      82% off
      82% off
      €212 €39
    • STL 7:49 PM
      2h 31m
      Nonstop
      DEN 9:20 PM
      St. Louis - Denver | Mon, Jan 4 | Frontier Airlines
      €40 €212
      81% off
      81% off
      €212 €40
    • STL 7:59 PM
      2h 31m
      Nonstop
      DEN 9:30 PM
      St. Louis - Denver | Mon, Nov 2 | Frontier Airlines
      €40
      81% off
      €212 €40
    • STL 7:49 PM
      2h 31m
      Nonstop
      DEN 9:20 PM
      St. Louis - Denver | Fri, Jan 1 | Frontier Airlines
      €40
      81% off
      €212 €40
    • STL 7:02 PM
      2h 31m
      Nonstop
      DEN 8:33 PM
      St. Louis - Denver | Wed, Jan 6 | Frontier Airlines
      €40
      81% off
      €212 €40
    • STL 7:59 PM
      2h 31m
      Nonstop
      DEN 9:30 PM
      St. Louis - Denver | Mon, Nov 16 | Frontier Airlines
      €40
      81% off
      €212 €40
    • STL 7:59 PM
      2h 31m
      Nonstop
      DEN 9:30 PM
      St. Louis - Denver | Sat, Nov 7 | Frontier Airlines
      €40
      81% off
      €212 €40
    • STL 7:54 PM
      2h 31m
      Nonstop
      DEN 9:25 PM
      St. Louis - Denver | Sat, Dec 12 | Frontier Airlines
      €40
      81% off
      €212 €40
    • STL 1:00 PM
      17h 25m
      1 stop
      DEN 2:00 PM
      St. Louis - Denver | Sun, Oct 18 | Normal Airline
      Find more flights
      Find more flights
    • Cheapest nonstop
      STL 7:58 PM
      2h 31m
      Nonstop
      DEN 9:29 PM
      St. Louis - Denver | Wed, Dec 2 | Frontier Airlines
      €39 €275
      86% off
      86% off
      €275 €39
    • STL 7:54 PM
      2h 31m
      Nonstop
      DEN 9:25 PM
      St. Louis - Denver | Sat, Dec 5 | Frontier Airlines
      €39 €275
      86% off
      86% off
      €275 €39
    • STL 7:49 PM
      2h 31m
      Nonstop
      DEN 9:20 PM
      St. Louis - Denver | Mon, Jan 4 | Frontier Airlines
      €40 €275
      85% off
      85% off
      €275 €40
    • STL 7:59 PM
      2h 31m
      Nonstop
      DEN 9:30 PM
      St. Louis - Denver | Mon, Nov 2 | Frontier Airlines
      €40
      85% off
      €275 €40
    • STL 7:49 PM
      2h 31m
      Nonstop
      DEN 9:20 PM
      St. Louis - Denver | Fri, Jan 1 | Frontier Airlines
      €40
      85% off
      €275 €40
    • STL 7:59 PM
      2h 31m
      Nonstop
      DEN 9:30 PM
      St. Louis - Denver | Mon, Nov 16 | Frontier Airlines
      €40
      85% off
      €275 €40
    • STL 7:02 PM
      2h 31m
      Nonstop
      DEN 8:33 PM
      St. Louis - Denver | Wed, Jan 6 | Frontier Airlines
      €40
      85% off
      €275 €40
    • STL 7:59 PM
      2h 31m
      Nonstop
      DEN 9:30 PM
      St. Louis - Denver | Sat, Nov 7 | Frontier Airlines
      €40
      85% off
      €275 €40
    • STL 7:54 PM
      2h 31m
      Nonstop
      DEN 9:25 PM
      St. Louis - Denver | Sat, Dec 12 | Frontier Airlines
      €40
      85% off
      €275 €40
    • STL 1:00 PM
      17h 25m
      1 stop
      DEN 2:00 PM
      St. Louis - Denver | Sun, Oct 18 | Normal Airline
      Find more flights
      Find more flights
    • Cheapest nonstop
      STL 4:19 PM
      2h 33m
      Nonstop
      DEN 5:52 PM
      St. Louis - Denver | Wed, Oct 21 | Frontier Airlines
      €120 €576
      79% off
      79% off
      €576 €120
    • STL 8:00 PM
      2h 39m
      Nonstop
      DEN 9:39 PM
      St. Louis - Denver | Fri, Oct 23 | Frontier Airlines
      €144 €576
      75% off
      75% off
      €576 €144
    • STL 9:00 AM
      2h 30m
      Nonstop
      DEN 10:30 AM
      St. Louis - Denver | Thu, Oct 22 | United Airlines
      €190 €576
      67% off
      67% off
      €576 €190
    • STL 8:00 PM
      2h 39m
      Nonstop
      DEN 9:39 PM
      St. Louis - Denver | Mon, Oct 19 | Frontier Airlines
      €215
      63% off
      €576 €215
    • STL 9:00 AM
      2h 30m
      Nonstop
      DEN 10:30 AM
      St. Louis - Denver | Tue, Oct 20 | United Airlines
      €325
      44% off
      €576 €325
    • STL 1:36 PM
      2h 24m
      Nonstop
      DEN 3:00 PM
      St. Louis - Denver | Sun, Oct 18 | United Airlines
      €466
      19% off
      €576 €466
    • STL 5:40 AM
      5h 9m
      1 stop
      DEN 9:49 AM
      St. Louis - Denver | Thu, Oct 22 | American Airlines
      €190
      67% off
      €576 €190
    • STL 5:40 AM
      5h 9m
      1 stop
      DEN 9:49 AM
      St. Louis - Denver | Wed, Oct 21 | American Airlines
      €222
      61% off
      €576 €222
    • STL 10:35 AM
      5h 32m
      1 stop
      DEN 3:07 PM
      St. Louis - Denver | Wed, Oct 21 | Delta Air Lines
      €223
      61% off
      €576 €223
    • STL 1:00 PM
      17h 25m
      1 stop
      DEN 2:00 PM
      St. Louis - Denver | Sun, Oct 18 | Normal Airline
      Find more flights
      Find more flights
    • STL 1:36 PM
      2h 24m
      Nonstop
      DEN 3:00 PM
      St. Louis - Denver | Sat, Oct 24 | United Airlines
      €259 €583
      56% off
      56% off
      €583 €259
    • STL 1:36 PM
      2h 24m
      Nonstop
      DEN 3:00 PM
      St. Louis - Denver | Fri, Oct 23 | United Airlines
      €327 €583
      44% off
      44% off
      €583 €327
    • STL 1:36 PM
      2h 24m
      Nonstop
      DEN 3:00 PM
      St. Louis - Denver | Thu, Oct 22 | United Airlines
      €231 €583
      60% off
      60% off
      €583 €231
    • STL 1:36 PM
      2h 24m
      Nonstop
      DEN 3:00 PM
      St. Louis - Denver | Wed, Oct 21 | United Airlines
      €259
      56% off
      €583 €259
    • STL 1:36 PM
      2h 24m
      Nonstop
      DEN 3:00 PM
      St. Louis - Denver | Mon, Oct 19 | United Airlines
      €326
      44% off
      €583 €326
    • STL 1:40 PM
      2h 29m
      Nonstop
      DEN 3:09 PM
      St. Louis - Denver | Mon, Nov 9 | United Airlines
      €161
      72% off
      €583 €161
    • STL 1:40 PM
      2h 29m
      Nonstop
      DEN 3:09 PM
      St. Louis - Denver | Mon, Oct 26 | United Airlines
      €113
      81% off
      €583 €113
    • STL 1:40 PM
      2h 29m
      Nonstop
      DEN 3:09 PM
      St. Louis - Denver | Fri, Nov 13 | United Airlines
      €196
      66% off
      €583 €196
    • STL 1:40 PM
      2h 29m
      Nonstop
      DEN 3:09 PM
      St. Louis - Denver | Wed, Nov 4 | United Airlines
      €113
      81% off
      €583 €113
    • STL 1:00 PM
      17h 25m
      1 stop
      DEN 2:00 PM
      St. Louis - Denver | Sun, Oct 18 | Normal Airline
      Find more flights
      Find more flights

Displayed flight fares from St. Louis to Denver are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com Price Insights: Flights from St. Louis Lambert International Airport to Denver International Airport

What is the cheapest month for one-way flights from St. Louis Lambert International Airport to Denver International Airport?

Data is based on average one-way flight prices from St. Louis Lambert International Airport to Denver International Airport in Trip.com's database over the past 12 months.

Based on Trip.com’s data from the past 12 months, if you’re looking for a low-cost one-way ticket from St. Louis Lambert International Airport to Denver International Airport, the best time to buy is in October, with an average price of €62. You’ll want to avoid September, when the average price can reach as high as €410.

€410
€236
€62
0
  • €62
    Oct
  • €246
    Nov
  • €144
    Dec
  • €141
    Jan
  • €198
    Feb
  • €75
    Mar
  • €102
    Apr
  • €172
    May
  • €165
    Jun
  • €125
    Jul
  • €210
    Aug
  • €410
    Sep

What is the cheapest day of the week to fly from St. Louis Lambert International Airport to Denver International Airport?

The data is based on the past 12 months and shows the average ticket prices from St. Louis Lambert International Airport to Denver International Airport for each day of the week in the Trip.com database.

Based on Trip.com’s data from the past 12 months, the cheapest day to depart from St. Louis Lambert International Airport to Denver International Airport is Wednesday, with average fares typically lower than other days. You’ll want to avoid flying on Monday, as ticket prices are usually the highest that day.

€234
€160
€86
€12
    Cheapest
  • €234
    Mon
  • €218
    Tue
  • €86
    Wed
  • €153
    Thu
  • €180
    Fri
  • €135
    Sat
  • €139
    Sun

Which airline offers the cheapest flights from St. Louis Lambert International Airport to Denver International Airport?

The cheapest airline flying from St. Louis Lambert International Airport to Denver International Airport is Frontier Airlines (from €39) among 6 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From €39
Delta Air Lines
From €84
American Airlines
From €88
United Airlines
From €113
Alaska Airlines
From €195
Hahn Air
From €472

Find more flights and airlines

What is the flight schedule from St. Louis Lambert International Airport to Denver International Airport?

Check the schedule for flights from St. Louis to Denver and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. F94567

    St. Louis Lambert International Airport

    7:54 PM

    STL

    2h 31m

    9:25 PM

    DEN

    S - T - T F -
    Search

  2. F93107

    St. Louis Lambert International Airport

    2:47 PM

    STL

    3h 52m

    Nonstop

    4:39 PM

    LAS

    S - - W T - S
    Search

  3. F94612

    Harry Reid Intl. Airport

    9:09 PM

    LAS

    2h

    Nonstop

    12:09 AM

    DEN

    S M T W T F S

  4. F92636

    St. Louis Lambert International Airport

    4:30 PM

    STL

    2h 28m

    Nonstop

    7:58 PM

    MCO

    S - - W T F S
    Search

  5. F91733

    Orlando Intl. Airport

    5:55 AM

    MCO

    4h 12m

    Nonstop

    8:07 AM

    DEN

    S M T W T F S
Find more flights and airlines

About St. Louis Lambert International Airport and Denver International Airport

Learn about St. Louis Lambert International Airport (STL) and Denver International Airport (DEN) — including location, terminals, transportation, and travel tips.

Flight distance 1,237.36 km
Cheapest one-way ticket price €39
Cheapest return ticket price €80

FAQs for St. Louis Lambert International Airport to Denver International Airport Flights

  • How long is the flight from St. Louis Lambert International Airport to Denver International Airport?

    St. Louis Lambert International Airport to Denver International Airport takes about 1 hour 56 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 4 daily flights from St. Louis Lambert International Airport (STL) to Denver International Airport (DEN).
  • The earliest flight from St. Louis Lambert International Airport to Denver International Airport departs at 05:10, and the last departs at 21:50, with about 22 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from St. Louis Lambert International Airport (STL) to Denver International Airport (DEN) is quite popular. Without considering departure times or holidays, tickets cost around €219 in November, the most expensive month to book this route.
  • The earliest flight departs from St. Louis Lambert International Airport (STL) at 09:00 and arrives in Denver International Airport (DEN) at 10:30.
  • The latest flight departs from St. Louis Lambert International Airport (STL) at 20:40 and arrives in Denver International Airport (DEN) at 22:10.
  • Frontier Airlines is a very popular airline operating an average of 1898 flights per month.
  • One-way flights from St. Louis Lambert International Airport to Denver International Airport currently start from €39, and round-trip fares start from €80. The current lowest fare is a Frontier Airlines flight departing on Thu, Dec 3; prices may vary depending on availability.
  • Yes. United Airlines and Frontier Airlines operate direct flights from St. Louis Lambert International Airport to Denver International Airport, with an average flight time of 1 hour 54 minutes, and around 76 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from St. Louis Lambert International Airport to Denver International Airport is €176. Prices may vary depending on the departure date, airline, and availability.
  • Frontier Airlines and Volaris are the most popular budget airlines flying from St. Louis Lambert International Airport to Denver International Airport, with one-way fares starting from €39. Compare final prices carefully, as baggage, seat selection and payment fees may apply.
  • St. Louis Lambert International Airport to Denver International Airport operates around 76 weekly flights, mainly by United Airlines and Frontier Airlines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter St. Louis Lambert International Airport and Denver International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

Popular Destinations

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.